Perpetual Funding Cash-Flow Estimator

Per-settlement perpetual cash flow—

Assumed settlement count—

Total funding cash flow—

Percent of perpetual notional—

Simple nominal annual scale—

ScopeFunding only; not two-leg PnL or APR on capital

Formula and limits

Enter how many settlements you expect the position to cross. Funding applies at actual settlement times to positions still open then, so holding hours alone do not determine the count.

The sign follows the perpetual leg: with a positive rate, a short is positive and a long is negative; a negative rate reverses it. cash flow per settlement = perpetual notional × period rate × side.

The annual field linearly extends the current forecast and cadence for one year without compounding. It does not forecast later rates. A spot-plus-perpetual hedge also needs separate estimates for both legs’ fees, slippage, basis, borrowing and margin risk.

OKX documents fundingRate as the forecast approaching fundingTime; nextFundingTime is the next estimated settlement and cadence can change. We checked the official API documentation in September 2026.